Mathematics · Foundation

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Measuring without a rulerRunning
Number line. Handspans counted at 18 spans. Length measured 276 cm, Bench length 180 cm. Currently length measured is over by 96 cm.TUNING-50-40-30-20-100102030405018 SPANS276 cm
t = 0.0s

Length measured

276cm

Bench length

180cm

18 spans

Number line. Handspans counted at 18 spans. Length measured 276 cm, Bench length 180 cm. Currently length measured is over by 96 cm.

What has to balanceL=n×uL = n \times u

What is happening

You arrive at a classroom measuring a bench when the metre rule has gone missing.

The bench has to be logged before the new tables arrive and there is no rule in the room. One handspan measures 15 cm, and the bench runs 180 cm.